update readme

README.md

@@ -8,6 +8,56 @@ GTK 4 / Libadwaita client written in Rust
 
 ![image](https://github.com/user-attachments/assets/cfbbc3fb-61d2-4afd-a21f-8e36ee329941)
 
+## Features
+
+* Interface
+  * [x] Multi-tab
+  * [x] Hotkeys
+  * [ ] Bookmarks
+  * [ ] Build-in multimedia support
+  * [ ] Certificates management
+  * [ ] Downloads
+  * [ ] History
+  * [ ] Proxy configuration
+  * [ ] Server info
+  * [ ] Session restore
+    * [x] Tabs
+    * [x] Page
+      * [ ] Navigation
+        * [x] Request
+        * [ ] History
+  * [ ] Settings
+* Protocols
+  * [x] [Gemini](https://geminiprotocol.net/docs/protocol-specification.gmi)
+    * [Status codes](https://geminiprotocol.net/docs/protocol-specification.gmi#status-codes)
+      * [x] Success
+        * [x] 20
+      * [x] Input
+        * [x] 10 Input
+        * [x] 11 Sensitive input
+      * [ ] Redirection
+        * [x] 30 Redirection
+        * [ ] 31 (partial)
+      * [ ] Failure
+        * [ ] Temporary failure
+        * [ ] Permanent failure
+      * [ ] Client certificates
+    * [ ] Gemfeeds
+  * [ ] [Nex](https://nightfall.city/nex/info/specification.txt)
+* Media types
+  * Text
+    * [x] `text/gemini`
+    * [x] `text/plain`
+  * Images
+    * [x] `image/gif`
+    * [x] `image/jpeg`
+    * [x] `image/png`
+    * [x] `image/webp`
+  * Audio
+    * [ ] `audio/mpeg`
+    * [ ] `audio/ogg`
+  * Video
+
 ## Build
 
 ### Requirements